Method and apparatus for making concrete pipe



June 16, 1 931.

o. TUERCK METHOD AND APPARATUS FOR MAKING CONCRETE PIPE Fi led Oct. 2. 192a 4 She'ts-Sheet, 1

I 0 2 I O 1 r i I I 42 47 I T -T sir W 2/ 45 22 I i l 1 /2 I hi Mn 4 7H: 3 m j INVENTOR,

030A??? TUER cm.

' ATTORNEY.

June 16, 1931. o. TUERCK 1,810,583

METHOD AND APPARATUS FOR MAKING CONCRETE PIPE 4 Sheets-Sheet, 2

Filed Oct. 2, 1928 F 1 5 a INVENTOR 0 can Tune 0/17.

ATTORNEY AND APPARATUS FOR MAKING CQNORBTE P11! Filed Oct. 2. 1928 4 Sheets-Sheet. 3

June 16, 1931. I o. TUERCK I I us'ruon INVENTOR, 03cm? TUER 0/6- :ATTORNEX L wmuamm.

O. TUERCK June 16, 1931.

METHOD AND APPARATUS FOR MAKING CONCRETE PIPE FiledOct. 2, 1928 4 Sheets-Sheet, 4

.a .m i Y 3,9. mm m R mm m T. m. F A k w 5 0 04 7 Xv Y B Patented June 16, 1931 PATENT OFFICE OSCAR TUER'CK, OF PORTLAND, OREGON, ASSIG'NORE THE MCKENZIE COMPANY, A

CORPORATION OF OREGUN 7 METHOD'AND APPARATUS FOR MAKING CONCRETE PIPE- Application filed October 2, 1928.: Seria1- No. 309,736.

This invention relates toimprovements in the method of'maliing lined concrete pipe together with the core-apparatus employed in the mold for making: the same other varieties of pipe. 1

The object of the invention is to provide novel method of forming concrete pipe. having .an interior lining of non-corrod'ing h: impervious or wear-resistant material, such as vitrified clay tiles.

A further object of the invention is the provision of a core or inner removable mololwall to which .tilesor other lining material for the pipe to be formed therein maybe see cured for introductionwithin the moldand which iscollapsible to admit of smoothing and finishing theinterior surface of. the pipe and to. facilitate its removal from the finished 31 e. V I

1 ther objects and advantages of my invention, and objectsrelating-to details in the structure; of the apparatus. employed in invention will be readily apparent in the, course of the full description to follow.

,The accompanying drawings illustrate by way of example a representative fornr of' apparatus with which my improved method maybe carriedout, in whicl-r;

Figure l is a view inside elevation offa pipe-making machine illustrating my im proved collapsible core and actuating mechanisnn parts being broken away to show the interior of the core in collapsed condition;

Fig.2 is a view in vertical-cross-section of a mold-jacket and collapsible core therefor with a finished pipe-section shown therein- .Fig. 8. is a view )artly in top plan and artlyfin horizontal section of the moldacket and core.

Pg. 4* isa view inhorizontal section on line of Fig.2

Fig; 5 is a top plan viewof a pipe-section detached from the mold, illustratingthe finished. pipe with a segment of the interior surface shown lined with tiles or the like. d Fig. 6 is a perspective view of a core with the liner tiles secured thereto preparatory totheir introductionwithin a mold. a

Fig. 7 is. a fragmentary underside plan view of'the covering plate for the mold;

Fig. 8 is a detached view in side elevation of the covering plate with parts thereof broken away,

Fig. 9' is a fragmentary view in plan of the core illustrating the vertical joint in the core-sheet.

Referring to said views, wherein similar reference characters indicate like parts inthefseveralviews, the reference numeral I designates'tl'ie' base of a concrete-pipe forming machine of well known construction upon which a turntable 2 is mounted for rotation. Sai'd' turntable is rotativein a vertical bearing- 3 and is shown as having a circul'ar' rack-gear 4' on its underside engaged by a pinion 5 which it may be driven. The pinion 5 is secured on a shaft 6 mounted for rotation upon suitable bearings, such as 7, an'dextei'ids throughthe base 8 of a column 10 where power may be applied thereto through a belt-pulley 11*.

Ase'ction'al outer mold or jacket 12 is de- V tachablysecured to the turntable to rotate tl'i'erewith. and is supportedu'p'on blocks 13 adjustable thereon to maintain therjacket in concentric relation with the axis of rota tion of the turntable} The j acket-sections are secured together by clamps 15 or by other suitable means andea'ch comprise a semicircular base-casting 16jhaving a beveled ledge 1'6 with which a pallette 19 is engageably supported. ,Said pallette is formed to mold the spigot-end 17 of'. the pipe 18-. and includes an inwardly directed flange 20 extending. horizontally. its upper end each said j acket-section includes a semi-circular rim-casting 21 vandbetween the castings L6;

andQL a: metal sheet-T2215; secured in semicircular form to mold the exterior surface of the-pipe.

The column 1-0 extends upwairdly and over the turntableintwo rigid branches 23am? 245 terminal ing in spaced bearings '26in 'ver tica'l? alignment with the axis of rotation of the turntable. A shaft 27 is longitudinally slidable in said bearings and is maintained against rotation thereinby a feather-key 28.

The sha'ftf27 may bel ifted in said bearings by any suitable means, indicated by the cable 30, running through the sheave-block 31 mounted in the upper end of the shaft.

An inner mold or core for the pipe to be formed is mounted upon the lower end of the shaft 27 and consists in a sheet-metal drum 32 having its vertical edges adapted to abut or to overlap to respectively maintain the full diameter 'of the core or to reduce such diameter to a relatively slight extent in such positions. Such vertical edges terminate in strips 33 and 34 having, respectively, oppositely inclined abutment surfaces 36 and 37 to facilitate. their abutting and overlapping movements.

Hubs 38 are slidably mounted upon the shaft 27 at the upper and lower extremities of the core or at other desired positions therein and from which extend a plurality of evenly spaced lugs 40 in radial directions. Complementary lugs 41 are rigidly secured to the inner surface of the core-sheet. Links 42 are provided respectively connecting each said pair of lugs and may each comprise heads 43 at their opposite ends pivotally connected to the respective lugs and are each joined by a rod 45 oppositely screw-threaded at their opposite ends extending into screwthreaded bores, not shown, in the respective heads whereby the effective lengths of said links may be adjusted, somewhat in the manner of a turnbuckle.

' Collars l6 and 47 are pinned to' the shaft below the respective hubs 38 and are arranged to engage the hubs when the shaft is lifted to move the hubs along the shaft and thereby pull the links into inclined positions, as indicated in Fig. 1, and thus draw the core-sheet inwardly to a relatively slight extent to reduce its diameter through such inward pull which the consequent overlappin of its edges 33 and 34 will admit.

The lower collar l7 is cupped on its underside and engages with a centering pin 48 extending upwardly from the center of the turntable whereby the core is maintained in concentric rela'lion with the outer acket.

Medially between the hubs 38 a further hub 50 is loosely mounted on the shaft from which extend lugs 51 in radial directions with which fixed lugs 52 on the core-sheet co-operate. Pairs of arms 53 are rigidly secured upon opposite sides of the lugs 51 extending in horizontal directions and each such pair is respectively slidably secured to the lugs 52 by means of one or more bolts 54; extending laterally from the lugs and protruding through horizontally directed slots 55 in the outer ends of the arms, whereby the core-sheet may move slightly inwardly or outwardly in response to the pull or thrust of the links 42 and wherein the extent of the contraction may be limited by the size of the slots.

The lower portion of the hub 50 is flared, as at 56, having a conical recess 57 on its under side to receive a cone-head 58 of a clutchmember 60 pinned to the shaft. Said clutchparts are engaged when the shaft is lifted, as indicated in Fig. 1, and disengaged when the core is expanded by lowering the shaft relative to the core-sheet, as shown in Fig. 2. A screw-rod 61 extends through the hub 50 or flared portion thereof 56 and extends upwardly in proximity to the top of the core where it terminates in a wheel-handle 62 within easy reach of the operator whereby the rod may be screwed down upon the cone-head 58 when the clutch-parts are separated and thus lock them in such separated condition. The rod 61 is screwed down to separate the clutchparts only when it is desired to lift the core while in expanded condition or when it is desired to lower the core while fully expanded.

Numeral 63 indicates a plane sheet metal plate of circular configuration having a central aperture 65 through which the shaft 27 extends and which is connected to the shaft by means of a bridge-bar 66 extending diametrically across said aperture and bearing a hub 67 slidably mounted upon the shaft by means of a feather-key 28 to prevent its rotation thereon. The plate 63 normally rests upon the upper of the hubs 38 and when the core is in fully expanded condition Within the jacket the outer rim of the plate rests upon the core and the jacket. A recess 70 is'forined inthe perimeter of the plate through which the removable feed-spout, not shown, of the concrete-mixture supply devices protrudes whereby the concrete is fed to the space 71 between the core and the jacket where the pipe is formed. Recesses 7 2 may likewisebe formed in the marginal edge of the plate through which may extend tamping-rods, not shown, for compacting the pipe material in the mold.

Upon the underside of the plate 63 a castmetal plow 73 is secured by bolts 75 extending concentrically for approximately 180 degrees about the circular plate and inset from its marginal edge to enter the mold-space in con act. on its inner face with the outer surface of the core-sheet 32. Said plow may be of hollow construction with an open side contiguous to the core-sheet and is formed in crosssection to conform to the desired shape of the socket 76 which it is designed to mold upon the bell-end of the pipe. The ends 77 of said plow are shaped in tapered form, see Fig. 8, to engage the pipe material. as it revolves with the mold against the plow and thus compact the material at its side and bottom and molding an annular channel constituting the socket 76 to receive the spigot-end 17 of an adjoining pipe-section.

' In the operation of my apparatus for making concrete pipe of monolithic construction the jacket is assembled and secured to the turntable when the core is elevated theresweet above, as indicated in Fig. 1, in which position the core is in its reduced condition of irth due to the inward pull of the links 42. IVhen ready thecore is lowered"w ith the shaft 27 concentrically within the jacket so that the core-sheet 32will rest upon the flangeQO of the pallette whereupon the shaft will continue to move downwardly by its gravity to seat upon the pin 48 and in so doing will thrust out the links 42 inca'u'sing them to extend in horizontal positions,-as seen in Fig. 2, thereby expan'ding'the core sheet and allowing the edge-strips33 and 34' to abut and the core-sheet to assume its fully cylindrical condition.

Simultaneously with the seating of the shaft at its lowermost position the clutchmember 60 will be released fromits engage ment, with the hub and the plate 63 is then brought to restupon the upper hub 38 and acket with the plow 73 entering the mold-space and engaging the core-sheet upon its inner side. I I

In such condition of the mold the operation of feeding the pipe material into the mold and tamping it into desired form and fillllness may be consummated. The core will rotate with the turntable and jacketand about the rigidly held shaft. The plate 63 will also remain stationary with the shaft and main-j tains the plow 7 3 firmly against the rotating concretematerial in the moldspace and thus forms the socket, as described, as the ma:

terial is fed to the top of the mold and fini edgestrips 33 and 34-130 overlap, asindicated in Fi 9. In the same upward movementof the s aft the plate 63i is elevated with it through engagementby the upper hub 38 and the plow is thereby removed from the socket in the pipe just formed through its instrumentality. i

In such condition oftlie corethe jacketand pipe therein continue to revolve in the direction of the arrow inFi'g. 9 while the core is held stationaryby the clutch, and while reduced in size to arelativelyslight amount it will still engage the :pipe but with greatly reduced frictional contact and withan effecattempt should be made to check therotation of the core relative to the pipe while in full engagement therewith.;: The continued rotation of thepipe against the core affords an effective trowelling action upon the inner surface of the pipe thoroughly smoothing the inner 'wall and making the same less p'ene t'ratable to liquids. When such trowelling action is completed theshaft'is again act u 1 ated to lift the core entirely free from and above the acket and pipe, as shown in Fig. '1, whereupon. they can be removed from the turntable and separated as desired.

The provision of the apparatus just described affords opportunity to employ a'novel method of pipe construction-wherein the pipe isprovided with a lining of other material thanconcretev For sewers, or for'other uses where aprotective lining is believed to have moreresistance to disintegrating gases and other corrosive agents than concrete material,

vitrified clay plates or tiles laid and embedded in its inner surface are sometimes employed. In such where a lining is required I expand the core while still removed from the jacket, as by supporting the coresheet upon short planks, not shown, laid across the top of the jacket, and locking-the core in such conditionby screwing down the screwrod 61 uponthe clutch-head 58. I then lay tiles .8001' analogous liningplates formedto 1 the proper curvature upon the exterior of the core-sheet, as seen in Fig. 6, either entirely' about its circumference, as shown in Fig., 1,or partially thereabout, asthe specifications may require. The tiles may belaid upon the.v corep'in staggered rowsand with cement grouting in the joints therebetween; I then tie each said row with bands 81 of tiles closely to the core-drum. In such condiwire or other suitable material cinching the tionthe core may be lowered into-the, jacket which places the tiles in the mold-space '71.

Thepipe is then formed in the usual manner which will embed the tiles in the inner surface thereof. Should the lined sector desired be less than the entire inner circumference of thepipe, asshownin Fig. 5, the concrete portion and the tiled portion will present a uniformly cylindrical surface while the ties 81 will remain in the p-ipe'walls as valuable adjuncts of reinforcement. The core is then shrunk to, its reduced dimensions for finishmg theinterior .of thepipe and is removed in the manner before described.

Having described my invention, what 1 claim, is

1. The method of; making lined concrete pipe, consisting in mounting and securing lining plates uponthe exterior of a mold core,'inser ting said core and attached plates lining plates the interiorwall of the pipe. I 2. The method of making lined concrete pipe, asspecifiedin claim. 1, wherein the withinthe exterior mold-j acket, and feeding" concrete pipe material within the mold-space five savinglin power than would bathe Case f between the core and jacket to embed said ias jacket and core are revolved inunison while v the pipe. materialis being fed intothe mold and holding thej c'ore against rotation while the jacket and pipe continue to revolve after the pipe is formed whereby the interior wall of the pipeis smoothed.

3. The method of making lined concrete pipe, consisting in mounting and securing lining plates upon the exterior of a moldcore, inserting said core and attached plates within an exterior mold-jacket, feeding concrete material within the mold-space between the core and jacket to embed sai d lining plates in the interior wall of the pipe, revolving the jacket and core in unison while the pipe material is being fed into the mold, contracting the core after the pipenaterial is poured, and simultaneously securing the core against rotation while the jacket and pipe continue to revolve.

1. The method of making concrete pipe, consisting in mounting lining plates upon the exterior wall of a mold-core, banding said plates to the core by metal ties, inserting said core and attached plates within an exterior mold-jacket, and pouring concrete pipe material within the mold-space between the core and jacket to embed saidlining plates and ties in the interior wall of the pipe, and shrinking said core and removing it from the interior of the pipe with said ties remaining in the pipe wall to afford reinforcement therefor.

5. In concrete pipe making appa -atus, a rotatable mold-jacket, a vertically movable, non-rotatable shaft, a cylindrical core mounted on said shaft and movable therewith into said jacket, said core being rotatable with the jacket when the shaft is in its lowermost position, and frictional means to brake the rotation of said core when the shaft is lifted.

6. 1n concrete pipe makin apparatus, as specified in claim 5, wherein the core comprises a sheet-metal drum having a. vertically disposed joint adapted toabut at its edges when expanded and to overlap thereat when contracted, and means operableby the lowering and raisingof the shaft to expand and contract the core, respectively.

7. In concrete pipe making apparatus, as specified in claim 5, manually operable means to maintain the braking devices out of operative engagement.

S. In concrete pipe making apparatus, a vertically movable, non-rotatable shaft, a cylindrical core mounted for rotation on said shaft and consisting in a sheet-metal drum having a vertically disposed abutting joint, links pivotally connected to the interior of said core-drumand slidable on said shaft to releasably retain the core-drum in expanded condition, and means operable with said shaft to'contract said core-drum when the shaft is lifted by drawing said links inwardly.

9. Concrete pipe making apparatus, as specified in claim 8, in which horizontally directed arms extend rigidly from a hub through which the shaft slidably extends and which are connected to said core-drum to admit of contraction thereof.

10. Concrete pipe making apparatus, as specifiedin claim 8, wherein abraking device is provided between the hub and the shaft and operable when the shaft is lifted to prevent rotation of the core when the core is contracted.

11. In concrete pipe making apparatus, a vertically movable, non-rotatable shaft, a cylindrical core mounted for rotation on said shaft and consisting in asheet-metal drum having a vertically disposed abutting joint, links pivotallyconnected to the interior of said-core-drum and slidable on said shaft to releasably retain the core-drum in expanded condition, means operable with said shaft to contract said core-drum when the shaft is lifted by drawing said links inwardly, cooperative braking devices connected on said shaft and with said core, respectively, operable when the shaft is lifted to prevent the rotation of the core, and manually operated means to maintain said bra-king devices in separated condition.

12. Concret pipe making apparatusconsisting in combination with a rotatable turntable and an outer mold-jacket mounted thereon having an inwardly directed flange at its lower end, of a vertically movable, nonrotatable shaft disposed in the axis of rotation of said jacket, a collapsible core-drum arranged to be supported upon said acketflange andconnected with said shaft for lowering and raising within the jacket, pivotally connected links slidable on sa-id shaft for expanding and contracting the core-drum.

13. Concrete pipe making apparatus, as specified in claim 12, including a plate mounted against rotation on the shaft and having means provided on its underside entering the mold-space between the jacket and core-drum for forming a bell-socket in the upper. end of the pipe. I 14. Concrete pipe making apparatus, as specified in claim 12, wherein a non-rotatable plow-device is provided adapted to be entered into the mold-space between the jacket and the core whereby the pipe material is rotatably moved against said device which is thus adapted to form a bell-socket in the upper end of the pipe.

1 5. Concrete pipe making apparatus, consisting in a vertically movable, non-rotatable shaft, a collapsible core-drum, a pair of hubs slidable on said shaft and a plurality of links pivotally connected at opposite ends to said hubs and to said core-drum for expanding and contracting the core-drum.

16. Concrete pipe making apparatus, as specified in claim 15, in which horizontally directed arms extend rigidly from a hub through which the shaft slidably extends and which are connected to the core-drum by a radially slidable connection to admit of the contraction'and expansion of the core-drum. 17. Concrete pipe making apparatus, as specified in claim 15, wherein a brakingclutoh is provided between the shaft and the V core-drum to prevent the rotation of the core whenthe core is contracted.

18. Concrete pipe making apparatus, as specified in claim 15, wherein means are pro-- vided on said shaft for moving said links upwardly at their inner ends to contract the core-drum when the shaft is lifted and simultaneously braking the rotative movements of the core-drum.

19. Concrete pipe making apparatus, conl6 sisting in a rotatable mold-jacket, a vertical ly movable, non-rotatable shaft extending axially of said mold-jacket, a cylindrical core mounted on said shaft and movable therewith into said jacket, and a plow-device non-rOtat- V ably mounted on said shaft and adapted to enter into the-mold-space between said moldjacket and the core whereby the pipe material is rotatably moved against said device which is thus adapted to form a bell-socket in the end of the pipe formed in said moldspace.

OSCAR TUEROK. 

